Combined relay and repeater for telephone-lines.



N0. 659,096. Paten'ed 00L 2, |900.

E. C. PARAMORE. COMBINED RELAY AND REPEATER FOR TELEIf'HONE LINES.

(Application led Nov. 1B, 1899.)

2 Sheets-Sheet I.

'me Noam; Psens co, PNoTaLurNn., WASHINGTON, n c

No. 659,096. Patented 0st. 2, |900.

E. C. PARAMRE.

COMBINED RELAY AND REPEATER FOR TELEPHONE LINES. (Application med Nav. 1a, 1899.)

(No Model.) 2 Sheets-Sheet 2.

UNirnD STATESy` nrnNr PFICE@ EDWARD O. PARAMORE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE-HALF -TO HOWARD T. GOODWIN, OF RIDLEY PARK, PENNSYLVANIA.

COMBINED RELAY AND REPEATER FOR TELEPHONE-LINES.

SPECIFICATION forming part of Letters Patent No. 659,096, dated October 2, 1900.

Application tiled November 18, 1899. Serial No. 737.482. (No model.)

fo all whom t may concern:

Be it known that I, EDWARD C.- PARAMORE, a citizen of the United States, residing at Philadelphia, (Germantown,) in the county of Philadelphia and State of Pennsylvania, have invented new and useful Improvements in a Combined Relay and Repeater for Telephone- Lines, of which the following is a specification.

My present invention relates to combined relays and repeaters; and one object of the same is to provide a combined relay and repeater at the junction of two long-distance telephone-circuits which will receive voicecnrrents from either line and transmit them wir h increased volume or reinforced strength from the incoming line to the outgoing line with equal efficiency in either direction.

Another object is to provide a combined relay and repeater which is automatically reciprocal in its action and which shall be so disposed that it will be fully responsive to currents originating in either circuit and will transmit said currents with increased Volume without reaction upon its own electromagnetic coils.

I attain the objects referred to by means of the construction shown in the accompanying drawings, in Which- Figure 1 is a diagram of two telephone-lines and showing my combined relay and repeater at the ju-nction of said two lines. Eig. 2 is a side View of my combined relay and repeater. Fig. 3 is a vertical section through one of the relay-transmitters. Fig. 4 is a face view of one of the transmitters, the diaphragm being removed. Fig. 5 is a plan View of the armature. Fig. 6 is aplan view of the diaphragm. Fig. 7 is a longitudinal section of the induction-coil.

Like characters of reference designate like parts in the different views.

Referring now to Fig. 2, the numeral l designates a suitable base or support. Secured to this base are four brackets 2, each comprising upright arms 3 and a right-angled foot 4, the latter being secured to the base 1. These brackets are arranged in pairs at the ends of the base, and secured to the upright arms 3 of each pair of brackets is a relaytransmitter 5. Since both of these transmit.- ters are identical in construction and arrangement, a description of oneonly will be necessary for a full understanding of both.

Secured to the upright arms 3 of two of the 55 alined brackets 2 is a ring or annulus 6. The bolts or screws 7, four in number, hold the ring 6 firmly to said arms 3. A dome 8 is secured within the ring 6 by suitable means, such as a metallic strip or band 9, secured 6o centrally to the dome by a screw 10 and at the ends of the strip by the bolts 7.

The screw l0 passes into the dome and serves as a support for an electromagnet 11, the terminals from which pass through binding-tubes 12 12 at the bottom ot' the dome, and from thence one of said terminals is cou-' nected to one line-circuit and one to ground.

The ring 6 is rabbeted at 13, and within the recess thus formed the diaphragm 14 is 7o seated. A rubber gasket 15 covers the edge of the diaphragm, and said diaphragmis held in place by two or more turn-buttons or keepers 16, attached at their outer ends to the ring 6.

A slender spring 17, attached at the upper edge of the diaphragm, extends to the center of said diaphragm and is provided with a pointed electrode 18, which bears against the carbon button 19, secured to the end of a 8o spring 20, the upper end of which is secured to the adjusting-lever 21. This adjustinglever is connected to a spring 22 at its upper end, said spring being attached to the ring 6 by screws 23. The lower end of the adj usting-lever is held in adj usted position by a setscrew 24,passing through a slot in the adjusting-lever and into a threaded aperture in the ring 6.

An induction-coi is secured to the base 9o l between the transmitters 5. This induction-coil 25 is supplied with three windingstwo primaries 26, wound one on top of the Vother in order to bring them as close as posextremes ofthe secondary 32 are connected to wires 32, which are oppositely connected t0 the main-line wires, one through the bindingpost a to the line d and the other through the binding-post al to the line c. The main lines, as shown, are grounded at both ends. Ihen the transmitter on line d is being used, the vibrations are directly transmitted to the repeating-diaphragm 14. These are taken up by the primary of the induction-coil and are intensified by the action of the battery 27 and induced in secondary 32 and transmitted to line c and thence to the receiver. As the apparatus is symmetrically arranged, the operation of the other repeater is obviously the same as the one just described. It is true that the current will divide at a and a por.- tion go directly into the secondary and thence over the line c; but since the resistance of the secondary is relatively great as com pared with coil 1l the interference caused by this division will be slight.

Having thus fully described my invention, what I claim is-- l. In a relay and repeater the combination of two telephone-lines, two repeating-magnets arranged to be actuated one by each of said telephone-lines, two microphones arranged to be actuated one by each 0f said repeatingmagnets, an induction-coil, a first primary on said ind notion-coil connected with one of said microphones, a second primary on said induction-coil connected to the other of said microphones, batteries in circuit with each of said primaries, and a secondary on said inductioncoil, having each of its free ends connected to one of said telephone-lines, substantially as described.

2. In a relay and repeater the combination of two telephone-circuits, two repeating-magnets one in each of the said telephone-circuits, two microphones, each being arranged to be actuated by one of said repeating-magnets, an induction-coil, a first primary on said induction-coil connected in circuit with one of said microphones, a second primary connected in circuit with the other of said microphones, and a secondary on said inductioncoil, which is Wound on top of the two primaries and oppositely connected to each of the said telephone-lines, substantially as described.

3. In a relay and repeater the combination of two telephone-lines, two repeaters one in each telephone-line, an induction-coil, a rst primary on said induction-coil, which is connected to one of said repeaters, a second primary on said induction-coil, which is connected to the other of said repeaters, a secondary on said induction-coil, which is connected at one end to one of said telephone-lines and at the other end to the other of said telephonelines, and batteries in circuit with said primaries, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

EDWARD C. PARAMORE.

Witnesses:

FRANK B. WAGNER, S. HORACE MYERS. 

